Marine boat.



No. 811,171. PATENTED JAN. 30, 1906. S. PEMBEBTON & J. P. DBADMAN.

MARINE BOAT.

APPLICATION FILED JULY 1B. 1905.

3 SHEBTSSHBET 1.

Qwuewkow) If adml .iPe/vmeriaw PATENTED JAN. 30

S. PEMBBRTON & J. P. DEADMAN.

MARINE BOAT.

APPLICATION FILED JULY 18 1905.

3 SHEETS- SHEET 2.

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JTJfW d 5 .perzw rfi 07 No. 811,171. PATENTBD JAN. 30, 1906. s.PBMBERTON & J. F. DBADMAN.

MARINE BOAT.

APPLICATION FILED JULY 18. 1905.

3 SHEETS-SHEET 3.

Wiiwzooe TTE il STATES PATENT OFFICE.

SAMUEL PEMBERTON AND JOHN F. DEADMAN, OF SAULT STE. MARIE, MICHIGAN.

MARINE BOAT.

Specification of Letters Patent.

Patented Jan. 30, 1906.

To all whom it may concern.-

Be it known that we, SAMUEL PEMBERTON and JOHN F. DEADMAN, citizens ofthe United States, residing at Sault Ste. Marie, in the county ofChippewa and State of Michigan, have invented certain new and usefulImprovements in Marine Boats, of which the following is a specification.

This invention relates to a boat of the type comprising an outer shellprovided with an exterior propeller and mounted to rotate about an innershell which is equipped with living quarters and with the engines andother appurtenances for safety, comfort, and the management of the boat.

For a full description of the invention and the merits thereof and alsoto acquire a knowledge of the details of construction of the means foreffecting the result refrence is to be had to the following descriptionand accompanying drawings.

While the invention may be adapted to different forms and. conditions bychanges in the structure and minor details without departing from thespirit or essential features thereof, still the preferred embodiment isshown in the accompanying drawings, in which Figure 1 is a side view ofa boat embodying the invention. Fig. 2 is a central longitudinal sectionof the inner hull or shell. Fig. 3 is a detail view illustrating thehollow rudderpost and its adjoining parts. Fig. 4 is a detail view ofthe rudder. Fig. 5 is avertical central longitudinal section of theouter hull, showing the inner hull or shell in full.

Corresponding and like parts are referred to in the followingdescription and indicated in all the views of the drawings by the samereference characters.

The boat comprises an inner shell or hull 1 and an outer shell or hull2, the latter being rotatable about a longitudinal axis and pro videdupon its exterior with a spiral propeller 3, which may consist of acontinuous wind or of a series of paddles or blades.

A hollow shaft 4 extends centrally of the boat, projects beyond theextremitles thereof, and is made conical at its ends, so as to olferaminimum amount of resistance to the propulsion of the boat. The hull orshell 1 is connected to the shaft 4 in any substantial manner, the twopartsthe hull 1 and the shaft 4 being relatively fixed, whereas theshell or hull 2 is rotatable, antifriction-bearings being providedbetween contracted ends of the hull 2 and the end portions of the shaftadjacent to the extremities of the hull 1. The joints are made tight, soas to obviate leaking, which would necessitate the expenditure of forcefor expelling bilge-water. The cabins and other quarters provided forthe occupants of the boat are suitably distributed throughout the lengthand at the sides thereof. The engines 5 for propelling the boat arelocated. so as to distribute the weight uniformly of the boat, as wellas to secure an equalization of the strain incident to propulsion whenthe boat is in motion. It is to be observed that the engines and otherweighted adjunctive parts occupy the lowermost position, this being ofadvantage in order to have the metacenter at as low a point as possible,whereby the stability of the boat is assured. Any well-known type ofgearing may be resorted to for transmitting power to the outer shell orhull for rotation thereof. It is pre ferred to provide a series oftoothed rings at intervals in the length of the hull 2 and have the sameintermesh with pinions connected with the respective engines to bedriven thereby.

A pilot-house 6 is located at each end. of the boat and is mounted uponthe terminal extensions of the shaft 4. A vertically-disposed tubularbearing 7 is arranged near each end of the shaft 4 and receives thehollow post 8 of a rudder, said post 8 being provided at its lower endwith a valve constituting a sea-cock, whereby water may be pumped in theboat when required for any purpose. The specific arrangement toaccomplish this end is best seen by reference to Fig. 3. The tubularbearing 7 is mounted on the outer end of the shaft 4 and receives thehollow rudder-post 8, which is provided at its lower end with a ballcock or valve 8. The hollow rudder-post 8 is provided inside of thetubular extension 7, which forms a bearing therefor, with suitable ports8, through which water pumped into the hollow rudder-post may findegress into the tubular bearing 7 and thence into a water-pipe 8 mountedinside of the shaft 4 and provided with any suitable form of valve 8.The smoke-stack for carrying off the smoke and products of combustionfrom the furnaces of the several engines passes through the shaft 4 andoutward and upward, as shown at 9, to discharge the smoke at aconvenient point.

The outer shell or hull 2 is provided with hatches 10, by means of whichegress and ingress to the boat is had. Folding hooks 11 are disposed atintervals in the length and circumference of the outer hull for securingthe boat when moored. .The hooks 11 are adapted to fold into pockets ordepressions formed in the outer side of the hull 2, so as to be out ofthe way when the boat is in motion.

Having thus described the invention, what is claimed as new is 1. A boatof the character described comprising a longitudinal shaft, twoconcentric hulls, one of which is fast on said shaft and the other ofwhich rotates outside of the fixed hull, the outer hull being providedwith a propeller, a pilot-house at each end of the said shaft outside ofthe said hulls, and a hollow rudder-post secured in the end of the shaftand provided with an opening to admit of water being pumpedtherethrou'gh for the purpose set forth.

2. A boat of the character described comprising a longitudinal shaft, aninner hull fixed on said shaft, and an outer concentric hull designed torotate on the shaft and provided with a propeller, hollow tubularbearings 7 secured to the shaft .at each end thereof outside of saidouter hull, pilot-houses supported at the end of said shaft, and arudder having a tubular post mounted in the tubular bearings 7 andarranged to admit of water being punlilped through the post for thepurpose set ort In testimony whereof we aflix our signatures in presenceof two witnesses.

Witnesses:

JOHN J. ONEIL, BEssE WRIGHT.

[L. s.] [L. s.]

